I found one pic of my engine with the manual steering alternator bracket. I know I have more, but I'd have to scan them in.
Again, the biggest problem I found was that running P225 or P235 radials up front makes it VERY hard to steer at slow speeds. You really do need to calculate out your turns, and as long as the car is rolling, it's not TOO bad, but if you get stuck at a cruise night or car show and HAVE to turn the wheel without moving, it's an absolute bear. You do need a larger steering wheel than the Formula wheel, preferably the factory wood wheel, I think those are larger diameter than the regular Pontiac plastic wheel.
In my opinion though, it's just not worth the 'cool' factor as much anymore as it used to be. Back in the 80's or even 90's, manual steering, manual brakes, heater delete, etc. were all great little things to show off the 'dinosaur' or barbaric Musclecar, brute strength-brawny look, but these little items make very little difference as far as weight savings, and they make the car much less enjoyable to drive.
If you do go manual steering though, be forewarned you need the manual steering pitman arm for the box. When I did the conversion, I found out the hard way that 1969 manual steering arm was unique. And typical, Flaming River (the makers of the Vega box) and other vendors lumped 1967-1969 together, but the 1969 arm is different. Without it, you will run into clearance problems with the #1 exhaust manifold tube or header.